title: A new natural naphtho[1,2-b]furan from the leaves of Cassia fistula.
abstract: A new naphtho[1,2-b]furan, 2,9-dihydroxy-7-methoxy-4-methylnaphtha[1,2-b]furan-3(2H)-one (1), along with 10 known compounds vanillic acid (2), naringenin (3), glyceryl-1-tetracosanoate (4), moracin J (5), 1,3,8-trihydroxyanthraquinone (6), esculetin (7), mauritianin (8), kaempferol 3-neohesperidoside (9), β-sitosterol (10), and β-daucosterol (11), was isolated from the leaves of Cassia fistula. The structure of the new compound was determined by NMR and X-ray analysis. Compounds 1, 3, 5-9 were isolated from this plant for the first time. The naphtha[1,2-b]furan was firstly isolated from the natural resources.
authors.affiliation: a Department of Chemistry and Chemical Engineering , Yunnan Normal University , Kunming , 650500 , China.
authors.forename: Li-Qin
authors.initials: LQ
authors.lastname: Wang
authors.forename: Zheng-Rong
authors.initials: ZR
authors.lastname: Tang
authors.forename: Wei-Hua
authors.initials: WH
authors.lastname: Mu
authors.forename: Jun-Feng
authors.initials: JF
authors.lastname: Kou
authors.forename: Dong-Yang
authors.initials: DY
authors.lastname: He
mesh_terms: D002366:Cassia / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D005663:Furans / Q000737:chemistry / Q000302:isolation & purification*; D044949:Kaempferols / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D009281:Naphthalenes / Q000737:chemistry / Q000302:isolation & purification*; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D012855:Sitosterols / Q000737:chemistry / Q000302:isolation & purification
chemical_list: C586929:2,9-dihydroxy-7-methoxy-4-methylnaphtha(1,2-b)furan-3(2H)-one; D004365:Drugs, Chinese Herbal; D005663:Furans; D044949:Kaempferols; D009281:Naphthalenes; D012855:Sitosterols; C025473:gamma-sitosterol